diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..ec02906
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,17 @@
+/// <reference types="node" />
+export class Reader {}
+export interface Reader extends NodeJS.ReadableStream {}
+export interface WriterOptions {
+    channels?: number;
+    sampleRate?: number;
+    bitDepth?: number;
+}
+export class Writer {
+    constructor(options: WriterOptions);
+}
+export type FileWriterOptions = WriterOptions & Exclude<Parameters<typeof import('fs')['createWriteStream']>[1], string>;
+export interface Writer extends NodeJS.WritableStream {}
+export class FileWriter {
+    constructor(path: string, options?: FileWriterOptions);
+}
+export interface FileWriter extends NodeJS.WritableStream {}
diff --git a/package.json b/package.json
index 9f24691..c804c45 100644
--- a/package.json
+++ b/package.json
@@ -6,6 +6,7 @@
   "author": "Nathan Rajlich <nathan@tootallnate.net>",
   "repository": "TooTallNate/node-wav",
   "dependencies": {
+    "@types/node": "*",
     "buffer-alloc": "^1.1.0",
     "buffer-from": "^1.0.0",
     "debug": "^2.2.0",